CanLoad
Interface that a class can implement to be a guard deciding if children can be loaded.
If all guards return true, navigation continues. If any guard returns false,
navigation is cancelled. If any guard returns a UrlTree, current navigation
is cancelled and a new navigation starts to the UrlTree returned from the guard.
canLoad
MaybeAsync<GuardResult>Description
Interface that a class can implement to be a guard deciding if children can be loaded.
If all guards return true, navigation continues. If any guard returns false,
navigation is cancelled. If any guard returns a UrlTree, current navigation
is cancelled and a new navigation starts to the UrlTree returned from the guard.
The following example implements a CanLoad function that decides whether the
current user has permission to load requested child routes.
class UserToken {}class Permissions { canLoadChildren(user: UserToken, id: string, segments: UrlSegment[]): boolean { return true; }}@Injectable()class CanLoadTeamSection implements CanLoad { constructor(private permissions: Permissions, private currentUser: UserToken) {} canLoad(route: Route, segments: UrlSegment[]): Observable<boolean>|Promise<boolean>|boolean { return this.permissions.canLoadChildren(this.currentUser, route, segments); }}
Here, the defined guard function is provided as part of the Route object
in the router configuration:
@NgModule({ imports: [ RouterModule.forRoot([ { path: 'team/:id', component: TeamComponent, loadChildren: () => import('./team').then(mod => mod.TeamModule), canLoad: [CanLoadTeamSection] } ]) ], providers: [CanLoadTeamSection, UserToken, Permissions]})class AppModule {}